Jason Eliowitz, Mettenberger's physical therapist, said the quarterback has been drinking at least one gallon of water per day to combat dehydration, according to ProFootballTalk.com.

Mettenberger's agent, Joe Linta, said medical documentation for Mettenberger's condition was provided to Dr. Lawrence Brown, the league's adviser for drugs of abuse and alcohol. Linta told Schefter he is still awaiting Brown's response.

Jernigan's agent, Sonny Shah, told ESPN's Joe Schad that, like Mettenberger, Jernigan's test result was a result of over-hydration.

Information from ESPN NFL Insider Adam Schefter and ESPN's Joe Schad was used in this report.